/**
* Check if a cache response satisfies a failed request's caching constraints
*
* @param RequestInterface $request Request to validate
* @param Response $response Response to validate
*
* @return bool
*/
public function canResponseSatisfyFailedRequest(RequestInterface $request, Response $response)
{
$reqc = $request->getHeader('Cache-Control');
$resc = $response->getHeader('Cache-Control');
$requestStaleIfError = $reqc ? $reqc->getDirective('stale-if-error') : null;
$responseStaleIfError = $resc ? $resc->getDirective('stale-if-error') : null;
if (!$requestStaleIfError && !$responseStaleIfError) {
return false;
}
if (is_numeric($requestStaleIfError) && $response->getAge() - $response->getMaxAge() > $requestStaleIfError) {
return false;
}
if (is_numeric($responseStaleIfError) && $response->getAge() - $response->getMaxAge() > $responseStaleIfError) {
return false;
}
return true;
}
